Starmer out by...?

Prediction market odds on Polymarket reflect aggregated trader expectations about Starmer's departure date, often diverging from traditional polling. While polls measure public opinion on approval or party preference, prediction markets price in traders' assessments of political risk, parliamentary dynamics, and potential triggering events. Markets typically react faster to breaking news and incorporate real-money incentives for accuracy, sometimes showing higher or lower confidence in specific timelines than polling suggests. Comparing the two reveals whether markets are pricing in scenarios polls may not fully capture.

The Starmer out by... market resolves on Dec 31, 2026. Resolution depends on whether Keir Starmer remains in office through each specified date threshold or leaves before it. Outcomes are mutually exclusive: only one will resolve to yes, corresponding to the earliest window in which his departure occurs. If Starmer remains in office through the final date, the latest outcome resolves yes. The market captures the full range of potential timelines, from near-term exits to his continued tenure through the end of 2026.

Key catalysts for Starmer out by... price movement include parliamentary confidence votes, internal Labour Party challenges, health emergencies, major policy failures, or external crises that destabilize his government. Economic data, election results in devolved nations, or scandals involving senior ministers could shift trader expectations about his longevity. Announcements of leadership contests or public statements from potential successors may trigger repricing. Media coverage of backbench rebellions or coalition tensions also influences market sentiment. Traders continuously reassess probabilities as the political landscape evolves, making the market highly responsive to Westminster developments.